Length Converter
Convert between metric and imperial length units instantly
Popular Length Conversions
Length Conversion
1 km = 1000 m
Length Units Reference
| Unit | Symbol | Equals (meters) |
|---|---|---|
| Kilometer | km | 1000 meters |
| Meter | m | 1 meter |
| Centimeter | cm | 0.01 meters |
| Millimeter | mm | 0.001 meters |
| Mile | mi | 1609.344 meters |
| Yard | yd | 0.9144 meters |
| Foot | ft | 0.3048 meters |
| Inch | in | 0.0254 meters |
Common Length References
Travel & Geography
1 mile = 1.609 km
100 km = 62.14 miles
Marathon = 42.195 km = 26.219 miles
Earth's circumference = 40,075 km
US coast to coast ≈ 4,800 km
Construction & Design
1 foot = 30.48 cm
1 meter = 3.281 feet
Standard door height = 2.1 m = 6.9 ft
Story height ≈ 3 m = 10 ft
2×4 lumber = 38×89 mm actual
About Length Converter
Our length converter supports all major metric and imperial units. Whether you're converting miles to kilometers for travel planning, feet to meters for construction, or inches to centimeters for design work, our tool provides accurate conversions instantly.
The tool automatically saves your recent conversions in your browser, making it easy to perform similar conversions later. Perfect for students, engineers, travelers, and anyone who needs quick length conversions.
How to Use
- 1
Select from unit
Choose the unit you want to convert from (e.g., miles, feet, meters)
- 2
Select to unit
Choose the unit you want to convert to (e.g., kilometers, meters, centimeters)
- 3
Enter value
Type the length value you want to convert
- 4
View result
The converted length appears automatically in the result field
Frequently Asked Questions
What is the difference between metric and imperial units?
What is the difference between metric and imperial units?
Metric units (meters, kilometers) are based on powers of 10 and are used globally. Imperial units (feet, miles) are primarily used in the US and UK. The metric system is easier for calculations, while imperial units are traditional in some countries.
How accurate are the conversions?
How accurate are the conversions?
Our conversions use precise conversion factors to ensure high accuracy. For example, 1 mile equals exactly 1.609344 kilometers. The results are accurate enough for all practical purposes including engineering and scientific calculations.
Which length units are commonly used in different countries?
Which length units are commonly used in different countries?
Most countries use the metric system (meters, kilometers). The United States primarily uses imperial units (feet, miles) for everyday measurements. The UK uses a mix of both systems. Aviation uses feet for altitude globally, while maritime distances use nautical miles.
How do I convert between very different scales?
How do I convert between very different scales?
When converting between very different scales (like millimeters to miles), the result might be a very large or very small number. Our converter handles these automatically and formats the result for readability. For extreme conversions, consider using intermediate units.